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bad

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mâi dii

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ไม่ดี

#59 most commonadjective↘ falling tone

What does ไม่ดี mean?

The most common way to express 'bad' or 'not good' in Thai. Used to describe anything negative — food, weather, behavior, situations, or feelings. Thai speakers use this constantly in daily conversation to express dissatisfaction or warn others. Can be softened with นะ (ná) or emphasized with มาก (mâak).

Example Phrases

aa-hǎan mâi dii

อาหารไม่ดี

The food is not good.

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Beginner

wan níi aa-gàat mâi dii

วันนี้อากาศไม่ดี

The weather is bad today.

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Beginner

nîi mâi dii

นี่ไม่ดี

This is not good.

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Beginner

pǒm rúu-sɯ̀k mâi dii

ผมรู้สึกไม่ดี

I don't feel well.

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Beginner

nân mâi dii mâak

นั่นไม่ดีมาก

That's very bad.

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Beginner

tâa mâi riian jà mâi dii sǎm-ràp a-naa-kót

ถ้าไม่เรียนจะไม่ดีสำหรับอนาคต

If you don't study, it's not good for your future.

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Intermediate

Related Words

dii

ดี

good

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yɛ̂ɛ

แย่

very bad

yɛ̂ɛ mâak

แย่มาก

terrible

pìt

ผิด

wrong

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